Composite laminate used for footwear and having separated carbon fiber layers and polyimide fiber layers, and preparation method therefor

Abstract

Provided in the present invention is a composite laminate for footwear. The composite laminate comprises a plurality of carbon fiber layers and a plurality of polyimide fiber layers. Adjacent fiber layers are composited together by means of a resin adhesive. The plurality of polyimide fiber layers are not adjacent to each other, and each polyimide fiber layer is separated from another polyimide fiber layer by means of the plurality of carbon fiber layers. Further provided in the present invention are a sole component comprising the laminate, a footwear product comprising the sole component, and a method for preparing the laminate. The mechanical properties of the composite laminate are improved by means of controlling the laying sequence, uniformity, direction, etc., of fibers in the laminate, so as to prepare a high-strength, high-toughness and light-weight resin-based composite laminate reinforced by hybrid polyimide / carbon fibers, thereby improving the comprehensive performance and service life of the laminate for footwear.

Description

Composite material laminate for shoes with spaced apart carbon fiber layers and polyimide fiber layers and method of making the same TECHNICAL FIELD

[0001] The present application relates to the technical field of composite shoe soles, and specifically relates to a composite material laminate for shoes and a method of making the same. BACKGROUND

[0002] Fiber-reinforced resin composite laminate is a commonly used composite material laminate for shoes, which is mainly composed of fiber materials and resin materials. In the industry, according to the use requirements, the performance of the composite material laminate is often changed by controlling the type and stacking structure of the fiber materials. Carbon fiber has the characteristics of high specific strength, tensile resistance, low bending, and low elongation, which can endow the composite material with high elastic modulus and high tensile strength. However, carbon fiber composite material also has the characteristics of poor impact resistance, poor toughness, high brittleness, and easy breakage. Polyimide fiber has high strength, good tensile resistance, large elongation, and good toughness, which can make up for the rigidity and poor toughness of carbon fiber. However, the strength and modulus of polyimide fiber are lower than those of carbon fiber, and the performance is inconsistent under different stress states, which can easily cause deformation and deterioration, affecting the reliability and service life of the composite material. Therefore, the laminate prepared by laying two kinds of fibers at the same time can have the advantages of both fibers, but also the disadvantages of both fibers. Due to the large difference between the characteristics of the two fibers, the laying sequence, fiber direction, and uniformity of the two fibers will have a great impact on the performance of the laminate. Some carbon fiber / polyimide composite laminates have insufficient toughness, which can easily cause brittle fracture of the laminate when subjected to impact during movement. Some carbon fiber / polyimide composite laminates have insufficient rigidity, which cannot meet the demand of propulsion performance of shoes, especially sports shoes. Some carbon fiber / polyimide composite laminates have a heavy weight, which cannot meet the demand of lightweight of shoe soles, especially sports shoe soles. TECHNICAL PROBLEM

[0003] The present application aims to provide a carbon fiber / polyimide fiber-reinforced resin composite laminate for shoes with high strength, high toughness, and excellent and stable comprehensive performance, and to provide a shoe sole member and a shoe product comprising the laminate, and a method of making the laminate efficiently and simply. TECHNICAL SOLUTION

[0004] In the first aspect of the present application, a composite material laminate for shoes is provided, comprising a plurality of carbon fiber layers and a plurality of polyimide fiber layers, adjacent fiber layers being bonded together by a resin adhesive, characterized in that the plurality of polyimide fiber layers are not adjacent to each other, and each polyimide fiber layer is separated from another polyimide fiber layer by a plurality of carbon fiber layers. According to this scheme, the initial fracture displacement and stiffness of the composite material are both increased, the material toughness is higher, and the bending and tensile strength of the material is increased and more resistant to deformation.

[0005] In some schemes, the fiber layer on the compression side is a polyimide fiber layer. According to this scheme, the energy absorption effect of the laminate is better than that of the carbon fiber layer on the compression side, and the displacement and failure strain when the material fails can be increased, which makes up for the disadvantage of the brittleness of carbon fiber and improves the elongation and toughness of the composite material.

[0006] In some schemes, a plurality of carbon fiber layers are laid on the side of each polyimide fiber layer away from the compression side. In some schemes, the plurality of polyimide fiber layers include a first polyimide fiber layer and a second polyimide fiber layer, the first polyimide fiber layer is located on the compression side, one or two pairs of paired adjacent carbon fiber layers are laid between the first polyimide fiber layer and the second polyimide fiber layer, and a pair of paired adjacent carbon fiber layers are laid on the side of the second polyimide fiber layer away from the first polyimide fiber layer. In some schemes, the number of carbon fiber layers laid on the side of each polyimide fiber layer away from the compression side is the same. When the polyimide fiber layers are separated by a plurality of groups of carbon fiber layers, and the number of carbon fiber layers in these groups of carbon fiber layers is close, compared with the unevenly gathered lay-up of polyimide fiber layers, the initial fracture displacement and stiffness of the composite material are both increased, the material toughness is higher, and the bending and tensile strength of the material is increased and more resistant to deformation.

[0007] In some schemes, the plurality of carbon fiber layers include a plurality of paired adjacent carbon fiber layers, the fibers of one layer of each pair of carbon fiber layers are laid at a clockwise acute angle α degrees with respect to the front-back direction, the fibers of the other layer of carbon fiber layers are laid at a counterclockwise acute angle α degrees with respect to the front-back direction, and the fibers of the polyimide fiber layer are laid along the front-back direction. In this document, the front-back direction is from the toe area to the heel area of the shoe sole (see Figure 1), and for the description of the angle, the front-back direction is taken as the 0-degree reference axis, the clockwise direction with respect to the reference axis is taken as the positive angle, and the counterclockwise direction is taken as the negative angle (see Figure 3). According to this scheme, the polyimide fiber is used to hybridize the carbon fiber to interlamination toughen the resin-based composite material laminate, and the symmetric angle design between adjacent carbon fiber layers can effectively improve the toughness of the laminate.

[0008] In some embodiments, the value of a is 15-45 degrees, at this fiber laying angle, the toughness of the laminated plate can be effectively improved, and the composite material has appropriate stiffness, so that the composite material laminated plate for shoes can improve the impact resistance while effectively enhancing the propulsion.

[0009] In the second aspect, a shoe sole member is provided, comprising the composite material laminated plate for shoes of any one of the preceding aspects, according to the scheme, the member can be lightened, has higher toughness and moderate stiffness, has excellent comprehensive performance, and is more suitable for use as a shoe sole member.

[0010] In the third aspect, a shoe product is provided, comprising the shoe sole member of any one of the preceding aspects, according to the scheme, the shoe product can be lightened, the shoe sole can consider support and rapid response according to the stress characteristics, has better propulsion performance, and has higher user experience.

[0011] In the fourth aspect, a preparation method is provided for preparing the composite material laminated plate for shoes of the preceding aspects, comprising the following steps: step one: layering, the position and angle of the carbon fiber and polyimide fiber prepreg are designed and layered to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling are applied according to the molding conditions, curing molding is completed to obtain a composite material laminated plate. In some embodiments, the preparation method further comprises step four: post-processing, the molded composite material laminated plate is polished, washed, sandblasted and painted. Preferably, the curing temperature is 110-220 DEG C, the pressure is 1-3 MPa, and the molding time is 5-30 min. Advantages

[0012] According to the scheme, high-strength and high-modulus polyimide fibers are used to hybridize carbon fibers to interlamination toughen the resin-based composite material laminated plate, to solve the problems of brittle fracture, aging and damage of the carbon fiber reinforced resin-based composite material laminated plate for sports shoes, by controlling the fiber layer laying sequence, setting the polyimide fibers on the compression side, and designing the angle of the carbon fiber layer relative to the front and rear directions, and controlling the uniformity of fiber hybrid laying, the laminated plate is lightened, has appropriate toughness and stiffness, and the comprehensive performance of the laminated plate is improved, a high-strength, high-toughness and light-weight polyimide fiber / carbon fiber hybrid reinforced resin-based composite material laminated plate is prepared, and the service life of the laminated plate for shoes is improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 shows a plan view of a shoe sole.

[0014] Figure 2 shows a schematic view of the fiber layering of the laminated plate in Example 1.

[0015] Figure 3 shows a schematic view of the fiber arrangement angle in Example 2. Embodiments of the present application

[0016] In order to make the purpose, scheme and advantages of the technical solutions of the present application more clear, the technical solutions of the present application will be described clearly and completely in the following with reference to specific embodiments of the present application. The terms used herein have the usual meanings in the art, unless otherwise specified.

[0017] The present application uses high-strength and high-modulus polyimide fibers to hybridize carbon fibers to interlamination toughen resin-based composite laminates, to solve the problems of easy brittle fracture, easy aging and easy damage of carbon fiber reinforced resin-based composite laminates for shoes. According to the manner of the present application, by controlling the fiber layer stacking sequence, the fibers on the compression side are set to polyimide fibers, and the fibers of the carbon fiber layer are designed with respect to the angle of the front and rear directions, and the uniformity of fiber hybridization laying is controlled to realize the lightweight of the laminates, so that the laminates have appropriate toughness and rigidity, the comprehensive performance of the laminates is improved, a polyimide fiber / carbon fiber hybrid reinforced resin-based composite laminate with high strength, high toughness and light weight is prepared, and the service life of the overall shoe laminate is further improved.

[0018] Several embodiments and several comparative examples of the present application are described below to illustrate the specific means and technical effects of the present application. The terms used in the following description are understood according to the usual meanings in the art, unless otherwise specified, for example, "compression side" refers to the side facing the ground when the laminates are assembled into shoe products; "tension side" refers to the side facing the upper when the laminates are assembled into shoe products.

[0019]

Sequential effects

[0020] Example 1

[0021] The present application provides a kind of composite material laminated sheet for shoe, from compression side to tensile side in turn is divided into 6 layers of fiber layer (as shown in table 1), wherein the fiber layer arranged in compression side is first layer, the fiber layer arranged in tensile side is sixth layer, different fiber layers are bonded together by resin adhesive, wherein the first layer is polyimide fiber layer, the second layer is carbon fiber layer, the third layer is carbon fiber layer, the fourth layer is polyimide fiber layer, the fifth layer is carbon fiber layer, and the sixth layer is carbon fiber layer (fiber layer laying order is seen in figure 2), with the toe area of the laminated sheet body as front, with the heel area of the laminated sheet body as back, with front-back direction as reference axis, relative to the clockwise direction of reference axis is positive angle, and the counterclockwise direction is negative angle, the fiber of first layer is arranged to be 0 ° with reference axis, the fiber of second layer is 15 ° with reference axis, the fiber of third layer is-15 ° with reference axis, the fiber of fourth layer is 0 ° with reference axis, the fiber of fifth layer is 15 ° with reference axis, and the fiber of sixth layer is-15 ° with reference axis.

[0022] Layer number Angle (°) Material 10 Polyimide fiber 215 Carbon fiber 3-15 Carbon fiber 40 Polyimide fiber 515 Carbon fiber 6-15 Carbon fiber

[0023] Table 1: laying mode of example 1

[0024] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminated sheet for shoe, which comprises the following steps: step one: layering, carbon fiber and polyimide fiber prepreg are laid according to the position order and angle design described in the above embodiment to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling according to the molding conditions, curing molding is completed to obtain a composite material laminated sheet, the curing temperature is 110-220 DEG C, the pressure is 1-3 MPa, and the molding time is 5-30 min; step four: post-processing, the molded composite material laminated sheet is polished, washed, sandblasted and painted to obtain a composite material laminated sheet for shoe.

[0025] The shoe composite laminates of the above-mentioned Example 1 and the same size of Comparative Example 1-2 were respectively subjected to performance testing and data comparison. Comparative Example 1 (as shown in Table 2) was compared with Example 1, and the only difference was the uniformity of the fiber layer distribution. Except for this, the compression side was polyimide fiber layer, and the fiber angle design and manufacturing steps were completely the same. Comparative Example 2 (as shown in Table 3) was compared with Example 1, and the only difference was that the laying order of the six fiber layers in Comparative Example 2 was exactly opposite to that in Example 1. The compression side of Example 1 was a polyimide fiber layer, while the compression side of Comparative Example 2 was a carbon fiber layer. Except for this, the fiber angle design and manufacturing steps were completely the same. The performance tested in Example 1, Comparative Example 1-2 was the initial fracture displacement and stiffness of the material, respectively. The performance test method used was the national standard. The initial fracture displacement refers to the displacement of the fiber-reinforced resin composite material when the first macroscopic crack or fracture occurs in the three-point bending test. This displacement corresponds to the time when the material begins to lose integrity or produce obvious cracks, which can reflect the toughness of the material. Generally, the higher the value, the better the material toughness. The representative value is the point where the nonlinearity or obvious decline appears on the force-displacement curve. The test method can refer to “GB / T1449-2005 Fiber Reinforced Plastics Bending Performance Test Method”. The stiffness refers to the ability of a material or component to resist deformation under load. In this technical solution, the stiffness specifically refers to the ability of the flexure part of the sole material to resist elastic deformation under stress. Components with high stiffness are less likely to deform under stress, while components with low stiffness are more likely to deform. The test method for stiffness can refer to “GB / T 32023-2023 Shoe Test Method for Flexure Stiffness”.

[0026] Layer Angle (°) Material 10 Polyimide fiber 215 Polyimide fiber 3-15 Carbon fiber 40 Carbon fiber 515 Carbon fiber 6-15 Carbon fiber

[0027] Table 2: Laying information of Comparative Example 1

[0028] Layer Angle (°) Material 115 Carbon fiber 2-15 Carbon fiber 30 Polyimide fiber 415 Carbon fiber 5-15 Carbon fiber 60 Polyimide fiber

[0029] Table 3: Laying method of Comparative Example 2

[0030] Example 1, Comparative Example 1 and Comparative Example 2 were respectively subjected to performance testing, and the results are shown in the following table:

[0031] Sample name code number mass (g) initial breaking displacement (mm) stiffness (Nm / deg) Example 1 US 7.514.5413.250.38 Comparative Example 1 US 7.514.3512.120.32 Comparative Example 2 US 7.514.6111.890.36

[0032] According to the performance test data comparison between the above-mentioned Example 1 and Comparative Example 1, in the example, the polyimide fiber layer and the carbon fiber layer are evenly laid between the two layers. Compared with the uneven laying of the two fiber layers, the uniform distribution of the two fibers can increase the initial breaking displacement value and the stiffness value of the composite material, indicating that the bending and tensile strength of the laminated plate is increased, the toughness is improved, the resistance to deformation and damage is enhanced, and the comprehensive performance of the material is improved.

[0033] According to the performance test data comparison between the above-mentioned Example 1 and Comparative Example 2, in the example, the initial breaking displacement and the stiffness are higher than those of the comparative example. In the present application, the fiber layer on the compression side is fixedly arranged as a polyimide fiber layer, which can increase the initial breaking displacement value of the laminated plate compared with the displacement value of the laminated plate with carbon fiber layer on the compression side, and the stiffness is also increased, indicating that the material toughness is improved, the energy absorption effect of the shoe sole is better than that of the laminated plate with carbon fiber on the compression side, the displacement and damage strain of the material at failure can be increased, the disadvantage of the brittleness of carbon fiber is compensated, and the elongation, toughness and impact resistance of the composite material are improved.

[0034]

Influence of angle

[0035] Example 2

[0036] The present embodiment provides a composite material laminated plate for shoes, which is arranged with 8 layers of fiber layers from the compression side to the tensile side (as shown in Table 4), wherein the fiber layer arranged on the compression side is the first layer, and the fiber layer arranged on the tensile side is the eighth layer. The different fiber layers are combined together by a resin adhesive. The first layer is a polyimide fiber layer, the second layer is a carbon fiber layer, the third layer is a carbon fiber layer, the fourth layer is a carbon fiber layer, the fifth layer is a carbon fiber layer, the sixth layer is a polyimide fiber layer, the seventh layer is a carbon fiber layer, and the eighth layer is a carbon fiber layer. The toe area of the laminated plate body is taken as the front, the heel area of the laminated plate body is taken as the back, the front-back direction is taken as the reference axis, the clockwise direction relative to the reference axis is taken as the positive angle, and the counterclockwise direction is taken as the negative angle. The fibers of the first layer are arranged at 0° to the reference axis, the fibers of the second layer are arranged at 15° to the reference axis, the fibers of the third layer are arranged at -15° to the reference axis, the fibers of the fourth layer are arranged at 15° to the reference axis, the fibers of the fifth layer are arranged at -15° to the reference axis, the fibers of the sixth layer are arranged at 0° to the reference axis, the fibers of the seventh layer are arranged at 15° to the reference axis, and the fibers of the eighth layer are arranged at -15° to the reference axis (the arrangement angles of the two fibers are shown in FIG. 3).

[0037] Layer number angle (°) Material 10 Polyimide fiber 215 Carbon fiber 3-15 Carbon fiber 415 Carbon fiber 5-15 Carbon fiber 60 Polyimide fiber 715 Carbon fiber 8-15 Carbon fiber

[0038] Table 4: Laying manner of Example 2

[0039] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminate for shoes, which comprises the following steps: Step 1: Laying, carbon fiber and polyimide fiber prepreg are laid according to the position order and angle design described in the above-mentioned embodiment to obtain a composite material; Step 2: Cutting, the composite material obtained in Step 1 is cut according to the shape of a mold; Step 3: Forming, the cut composite material is placed into a forming mold, and after pressure and heating, holding and cooling are applied according to the forming conditions, curing forming is completed to obtain a composite material laminate, the curing temperature is 110-220℃, the pressure is 1-3MPa, and the forming time is 5-30min; Step 4: Post-processing, the formed composite material laminate is polished, washed, sandblasted and painted to obtain a composite material laminate for shoes.

[0040] It should be noted that the "prepreg" described herein and in the following embodiments refers to an intermediate state material formed by immersing the carbon fiber or polyimide fiber to be laid in a thermosetting resin adhesive, the fiber brand of the "carbon fiber prepreg" is T300, T400, T700, T800, T1000 or T1100, etc., the fiber brand of the "polyimide fiber prepreg" is S20, S25, S30, S35, S40, and various feasible thermosetting resin adhesive materials can be used in the present application, including epoxy resin, polyurethane, acrylate, etc., and the present application does not limit the specific type of the thermosetting resin adhesive used.

[0041] Example 3

[0042] The present application provides a kind of composite material laminated sheet for shoe, from compression side to tensile side in turn is divided into 8 layers of fiber layer (as shown in table 5), wherein the fiber layer arranged in compression side is first layer, the fiber layer arranged in tensile side is eighth layer, different fiber layers are bonded together by resin adhesive, wherein the first layer is polyimide fiber layer, the second layer is carbon fiber layer, the third layer is carbon fiber layer, the fourth layer is carbon fiber layer, the fifth layer is carbon fiber layer, the sixth layer is polyimide fiber layer, the seventh layer is carbon fiber layer, the eighth layer is carbon fiber layer, with the toe area of the laminated sheet body as front, with the heel area of the laminated sheet body as back, with front-back direction as reference axis, the clockwise direction of reference axis is positive angle, and the counterclockwise direction is negative angle, the fiber of first layer is arranged to be 0 ° with reference axis, the fiber of second layer is 25 ° with reference axis, the fiber of third layer is-25 ° with reference axis, the fiber of fourth layer is 25 ° with reference axis, the fiber of fifth layer is-25 ° with reference axis, the fiber of sixth layer is 0 ° with reference axis, the fiber of seventh layer is 25 ° with reference axis, and the fiber of eighth layer is-25 ° with reference axis.

[0043] Layer Angle (°) Material 10 Polyimide fiber 2 5 Carbon fiber 3-25 Carbon fiber 4 25 Carbon fiber 5-25 Carbon fiber 6 0 Polyimide fiber 7 25 Carbon fiber 8-25 Carbon fiber

[0044] Table 5: layering mode of example 3

[0045] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminated sheet for shoe, which comprises the following steps: step one: layering, carbon fiber and polyimide fiber prepreg are layered according to the position sequence and angle design described in the above embodiment to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling are applied according to the molding conditions, curing molding is completed to obtain a composite material laminated sheet, the curing temperature is 110-220 ℃, the pressure is 1-3 MPa, and the molding time is 5-30 min; step four: post-treatment, the molded composite material laminated sheet is polished, washed, sandblasted and painted to obtain a composite material laminated sheet for shoe.

[0046] Example 4

[0047] The present application provides a kind of composite material laminated sheet for shoe, from compression side to tensile side in turn is divided into 8 layers of fiber layer (as shown in table 6), wherein the fiber layer arranged in compression side is first layer, the fiber layer arranged in tensile side is eighth layer, different fiber layers are bonded together by resin adhesive, wherein the first layer is polyimide fiber layer, the second layer is carbon fiber layer, the third layer is carbon fiber layer, the fourth layer is carbon fiber layer, the fifth layer is carbon fiber layer, the sixth layer is polyimide fiber layer, the seventh layer is carbon fiber layer, the eighth layer is carbon fiber layer, with the toe area of the laminated sheet body as front, with the heel area of the laminated sheet body as back, with front-back direction as reference axis, relative to the clockwise direction of reference axis is positive angle, and the counterclockwise direction is negative angle, the fiber of first layer is arranged to be 0 ° with reference axis, the fiber of second layer is 45 ° with reference axis, the fiber of third layer is-45 ° with reference axis, the fiber of fourth layer is 45 ° with reference axis, the fiber of fifth layer is-45 ° with reference axis, the fiber of sixth layer is 0 ° with reference axis, the fiber of seventh layer is 45 ° with reference axis, and the fiber of eighth layer is-45 ° with reference axis.

[0048] Layer Angle (°) Material 10 Polyimide fiber 2 45 Carbon fiber 3-45 Carbon fiber 4 45 Carbon fiber 5-45 Carbon fiber 6 0 Polyimide fiber 7 45 Carbon fiber 8-45 Carbon fiber

[0049] Table 6: layering mode of example 4

[0050] The present embodiment also provides a preparation method for preparing the above-mentioned composite material laminated sheet for shoe, which comprises the following steps: step one: layering, carbon fiber and polyimide fiber prepreg are layered according to the position sequence and angle design described in the above embodiment to obtain a composite material; step two: cutting, the composite material obtained in step one is cut according to the shape of the mold; step three: molding, the cut composite material is placed in a molding mold, and after pressure and heating, holding and cooling are applied according to the molding conditions, curing molding is completed to obtain a composite material laminated sheet, the curing temperature is 110-220 ℃, the pressure is 1-3 MPa, and the molding time is 5-30 min; step four: post-treatment, the molded composite material laminated sheet is polished, washed, sandblasted and painted to obtain a composite material laminated sheet for shoe.

[0051] The shoe composite laminates of Example 2, Example 3, Example 4 and the same code number of Comparative Example 3 are respectively subjected to performance testing and data comparison. In Comparative Example 3 (as shown in Table 7), the fibers of all layers are not designed in a symmetrical angle, and the fibers of all fiber layers are parallel to the front and rear directions, and the other manufacturing steps are exactly the same as those of Examples 2-4. The properties tested in Examples 2-4 and Comparative Example are initial fracture displacement and stiffness, and the performance testing method used is the Chinese national standard. The initial fracture displacement refers to the displacement of the fiber-reinforced resin-based composite material when the first macroscopic crack or fracture appears in the three-point bending test of the material sample. This displacement corresponds to the time when the material begins to lose integrity or produce obvious cracks, which can reflect the toughness of the material. Generally, the higher the value, the better the toughness of the material. The representative value is the point where the nonlinearity or obvious decline appears on the force-displacement curve. The testing method can refer to “GB / T 1449-2005 Fiber Reinforced Plastics Bending Performance Test Method”. The stiffness refers to the ability of a material or component to resist deformation under load. In this technical solution, the stiffness specifically refers to the ability of the flexing part of the sole material to resist elastic deformation under stress. Components with high stiffness are less likely to deform under stress, while components with low stiffness are more likely to deform. The testing method for stiffness can refer to “GB / T 32023-2023 Shoe Test Method for Flexing Part Stiffness”.

[0052] Layer number Angle (°) Material 10 Polyimide fiber 20 Carbon fiber 30 Carbon fiber 40 Carbon fiber 50 Carbon fiber 60 Polyimide fiber 70 Carbon fiber 80 Carbon fiber

[0053] Table 7: Layering method of Comparative Example 3

[0054] Examples 2-4 and Comparative Example 3 are respectively subjected to performance testing, and the results are shown in the following table:

[0055] Sample name Code number Mass (g) Initial fracture displacement (mm) Stiffness (Nm / deg) Example 2 US 7.5 20.3 38.9 0.653 Example 3 US 7.5 20.1 48.3 0.637 Example 4 US 7.5 20.6 28.2 0.617 Comparative Example 3 US 7.5 20.4 58.1 0.649

[0056] According to the performance test data of the above-mentioned embodiments 2-4 and comparative example 3, it can be seen that, in the present application, the symmetric angle is designed between different fiber layers, in embodiment 2, the symmetric angle is set to 15 degrees / -15 degrees, compared with comparative example 1 without angle design, the mass of the composite laminated plate is reduced, the shoe is more lightweight, the initial fracture displacement is increased, the toughness of the composite material is enhanced, and the stiffness of the composite material is also enhanced, which improves the impact resistance of the shoe while effectively enhancing the propulsion; in embodiment 3, the symmetric angle is set to 25 degrees / -25 degrees, compared with comparative example 3 without angle design, the mass of the shoe composite laminated plate is reduced, the initial fracture displacement is increased, the toughness of the composite material is stronger, and at the same time, the stiffness of the composite material is not significantly reduced, which improves the impact resistance while maintaining strong propulsion, so that the shoe is not easy to deform; in embodiment 4, the symmetric angle is set to 45 degrees / -45 degrees, compared with comparative example 3 without angle design, the initial fracture displacement is increased, the toughness of the composite material is enhanced, and the stiffness of the composite material is not significantly reduced, which improves the impact resistance while maintaining strong propulsion, so that the shoe is not easy to deform.

[0057] In a further embodiment, a shoe sole member is provided, as shown in Figure 1, which comprises the shoe composite laminated plate in any of the preceding embodiments, and the shoe sole member can be lightweight, has high toughness and moderate rigidity, and has excellent comprehensive performance, and is more suitable for use as a shoe sole member.

[0058] In a further embodiment, a shoe product is provided, comprising the shoe sole member shown in Figure 1, and the shoe product can be lightweight, the shoe sole can consider support and rapid response according to the stress characteristics, has better propulsion performance, and has high user experience.

[0059] The exemplary embodiments of the present application are described in detail herein with reference to the preferred embodiments, however, it can be understood by those skilled in the art that various modifications and changes can be made to the above-mentioned specific embodiments without departing from the concept of the present application, and various technical features and structures proposed in the present application can be combined without exceeding the scope of the present application, and the protection scope of the present application is determined by the appended claims.

Claims

1. A composite laminate for footwear, comprising multiple carbon fiber layers and multiple polyimide fiber layers, wherein adjacent fiber layers are bonded together by a resin adhesive, characterized in that, The plurality of polyimide fiber layers are not adjacent to each other, and each polyimide fiber layer is separated from another polyimide fiber layer by a plurality of carbon fiber layers.

2. The composite material laminate for footwear according to claim 1, characterized in that, The compression side is a polyimide fiber layer.

3. The composite material laminate for footwear according to claim 2, characterized in that, Multiple carbon fiber layers are laid on the side of each polyimide fiber layer away from the compression side.

4. The composite material laminate for footwear according to any one of claims 1-3, characterized in that... The carbon fiber layer comprises multiple paired adjacent carbon fiber layers. In each paired carbon fiber layer, the fibers of one carbon fiber layer are laid at an acute clockwise angle α degrees relative to the front-back direction, while the fibers of the other carbon fiber layer are laid at an acute counterclockwise angle α degrees relative to the front-back direction. Laying: The fibers of the polyimide fiber layer are laid in the front-to-back direction.

5. The composite material laminate for footwear according to claim 4, characterized in that... The value of α is 15-25 degrees.

6. The composite material laminate for footwear according to claim 4, characterized in that, The plurality of polyimide fiber layers includes a first polyimide fiber layer and a second polyimide fiber layer, the first polyimide fiber layer being located on the compression side, and one or two pairs of adjacent carbon fiber layers being laid between the first and second polyimide fiber layers. On the side of the imide fiber layer away from the first polyimide fiber layer, a pair of adjacent carbon fiber layers are laid.

7. The composite material laminate for footwear according to claim 3, characterized in that, The number of carbon fiber layers is the same on the side of each polyimide fiber layer away from the compression side.

8. A shoe sole component comprising the composite material laminate for footwear as described in claims 1-7.

9. A shoe product comprising the sole component as described in claim 8.

10. A preparation method for preparing the shoe composite laminate according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Lamination, lay up carbon fiber and polyimide fiber prepreg to obtain composite material; Step 2: Cutting. Cut the composite material obtained in Step 1 according to the shape of the mold. Step 3: Molding. The cut composite material is placed into the molding mold. Pressure is applied according to the molding conditions, and the material is heated, kept warm, and cooled to complete the curing and molding process, resulting in a composite laminate.

11. The preparation method according to claim 10, characterized in that, Also includes Step 4: Post-processing, the formed composite laminate is sanded, cleaned, sandblasted and painted.

12. The preparation method according to claim 10, characterized in that, The curing temperature is 110-220℃, the pressure is 1-3MPa, and the molding time is 5-30min.

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